Actually return the dataset in GetOperationalDataset

Author: ksperling-apple

src/app/clusters/thread-network-directory-server/thread-network-directory-server.cpp

@@ -274,8 +274,10 @@ void ThreadNetworkDirectoryServer::HandleOperationalDatasetRequest(
 
     uint8_t datasetBuffer[kSizeOperationalDataset];
     MutableByteSpan datasetSpan(datasetBuffer);
+    OperationalDatasetResponse::Type response;
     SuccessOrExit(err = mStorage.GetNetworkDataset(ExtendedPanId(req.extendedPanID), datasetSpan));
-    ctx.mCommandHandler.AddStatus(ctx.mRequestPath, IMStatus::Success);
+    response.operationalDataset = datasetSpan;
+    ctx.mCommandHandler.AddResponse(ctx.mRequestPath, response);
     return;
 exit:
     ChipLogError(Zcl, "GetOperationalDataset: %" CHIP_ERROR_FORMAT, err.Format());